Each Summer a Large "Dead Zone" Devoid of Fish and Other

question 64

Multiple Choice

Each summer a large "dead zone" devoid of fish and other animals develops where the Mississippi River flows into the Gulf of Mexico. What causes this?

• A)Acid rain makes the gulf's water too acidic to support fish.
• B)Global warming is making the river water too hot for the fish to tolerate.
• C)There are high levels of mercury in the river water.
• D)High levels of pesticides are used in the Mississippi River basin.
• E)Large quantities of fertilizer run off from midwestern farm fields into the Mississippi River.

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Definitions:

Swords

Edged weapons, longer than a knife or dagger, used historically in warfare or personal combat for cutting or thrusting.

Total Variable Cost

The sum of all costs that vary with output level in the production of goods or services, including materials and labor.

Total Variable Costs

The sum of all costs that vary with the level of output, including expenses such as materials and direct labor.

Swords

Weapons with a long, edged blade used for cutting, thrusting, or as a ceremonial symbol.